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Arminas Butkus +370 5 219 4884
AgGaSe2 crystals
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AgGaSe2 crystals

Main features

 

  • Excellent properties across the transmission range 0.73 to 18 μm
  • Low optical absorption and scattering
  • High FOM (figure of merit) for non-linear interactions in NIR and MIR

 

Application examples

 

  • Frequency mixing in the middle IR region from 4.0 to 18.3 µm
  • Second harmonic generation and up-conversion for CO2 lasers
  • Tunable OPO for solid state lasers with efficiency up to 10%
Request custom
  • Description
  • Properties
  • Specifications

Silver Selenogallate (AgGaSe2) has been demonstrated to be an efficient frequency doubling crystal for infrared radiation with transmission spectrum from 0.73 to 18 μm and no residual e-ray absorption centred around 1800 nm. Silver Selenogallate (AgGaSe2) useful transmission range lying within 0.916 μm and wide phase matching provide excellent potential for OPO applications when pumped by variety of lasers. Tuning within 2.512 μm could be obtained by pumping Silver Selenogallate (AgGaSe2) by Ho:YLF laser at 2.05 μm. This crystal also shows as an excellent properties for non-linear three-wave interactions.

Single crystal AgGaSe2
Crystal Structure
42m
Lattice(Cell) Parameters
a=5.992 Å, c=10.886 Å
Transmission Range
0,65-18 µm
Refractive Index
@1,06 µm
@3 µm
@5,3 µm
@10,6 µm
@12 µm

no=2.7010; ne=2.6792
no=2.6245; ne=2.5925
no=2.6134; ne=2.5808
no=2.5912; ne=2.5579
no=2.5837; ne=2.5505
Non-linear coefficient @10.6 µm
d36=33 pm/V
Optical damage threshold @10,6 µm, 150 ns
>10 MW/cm2
Optical damage threshold @1,06 µm, 10 ns
>350 MW/cm2
Thermal expansion coefficient
parallel to c-axis
perpendicular to c-axis

16,8×10-6×°C-1
-7,8×10-6×°C-1
Mohs hardness
>3
Material
AgGaSe2
Clear aperture
85%
Face dimensions tolerance
+0/-0,2 mm
Thickness tolerance
±0,2 mm
Parallelism error
<30 arcsec
Protective chamfers
<0,2 mm at 45°
Coatings
Uncoated
Surface quality
20-10 S-D
Wavefront distortion <λ/[email protected],8 nm
Material optical damage threshold
>350 MW/cm2 for 10 ns pulses @1064 nm

Custom components

We can customise this component to your needs. Please contact us for custom solution.

 

Request custom